That sounds perfectly ridiculous to me. The scar tissue would be low and anterior, the exact opposite of your placenta's location, unless we're dealing with the first ever case of a placenta migrating downward. Have you had other procedures besides the c/s that could have left scar tissue that she's referring to? I think "rambling off" is a great characterization... she sounds like she'd like to re-section and is grasping at straws for an excuse. I'd love to hear what she has to say if you ask her about that.